Changing sound card

Question

I have laptop with external sound card  and I would like to use the external one when its connected and the internal one when its not.
What have I done
I made simple udev rule which switches the default sound card like this:
su - $USER -c 'asoundconf set-default-card DAC'
Asoundconf is a simple python script which makes changes to local asoundconf
Problem with my solution
It works without issues when I'm not playing anything while connecting or disconnecting the card, but for example if I'm playing something on Spotify with the internal card and then connect the external one Spotify keeps on playing on my laptop speakers, but forgets the volume configurations. And if I'm playing something on the external card and then unplug it Spotify crashes.
What I want
Running programs to detect the sound card change automaticly
Alsa to remember volume configurations
Spotify to stop crashing when it loses the sound card
Last edited by oilgame (2013-12-29 03:40:15)

Answer 1

Rasi wrote:to make it work over network, allow tcp connections... or copy over your pulse cookie file.
So this should work out of the box, because I obviously have the pulse cookie file myself?
laasonen@t430s ~ % pactl stat | grep "alsa_output" | cut -d " " -f 3
alsa_output.usb-Burr-Brown_from_TI_USB_Audio_DAC-00-DAC.analog-stereo
alsa_output.pci-0000_00_1b.0.analog-stereo.monitor
laasonen@t430s ~ % sudo su - laasonen
laasonen@t430s ~ % pactl stat | grep "alsa_output" | cut -d " " -f 3
Connection failure: Connection refused
pa_context_connect() failed: Connection refused
laasonen@t430s ~ % ls -la .pulse-cookie
-rw------- 1 laasonen laasonen 256 Dec 18 03:32 .pulse-cookie
laasonen@t430s ~ %
I managed to archive the behavior I was looking for by loading "module-switch-on-connect"-module in default.pa, but I really would like to know how to manage pulseaudio in automatized scripts.
Last edited by oilgame (2013-12-29 13:18:15)